I'm probably just missing something obvious, as it's 3 am, but I can't seem to get the AT gauge to fill any faster, except by increasing agility and agility weight. In other words, the default fill speed in the parameters, does not seem to change the speed the gauge fills, no matter what I set it to. So either I'm missing something on how to get this to work (i.e. get the gauges to fill faster by default, so instead of taking say 10 seconds with 30 agi, it would take 5 seconds, and someone with higher agility would fill even faster than that) or I'm missing the point on what that parameter is supposed to do.
To clarify, increasing agi gets the gauge to fill faster, but if I want faster paced battles in general, right now it seems like the only thing I can do is significantly increase everyone's agility.